Improvement in grinding-mills



S. G. SCHOFIELD.

Grinding-Mil1s.

No. 199,999. Patented Feb.- 5,1878.

Fig. 1.

WITNESSES! mum-Q, M INVENTEIRZ,

EILAE B. SEHUFIELD ATTYE.

N.PETER5. PHOTOLlTHOGRAFHER. WASHINGTQN, D. C,

UNITED STATES PATW.

SILAS O. SOHOFIELD, OF FREEPORT, ILLINOIS.

IMPROVEMENT lN GRINDING-MILLS.

Specification forming part of Letters Patent No. 199,999, dated February5, 1878; application filed February 26, 1877.

To all whom it may concern:

Be it known that I, SILAS O. ScH'oFIELn, of Freeport, in the county ofStephenson and State of lllinois, have invented a new method ofoperating feed-mills by the ordinary pimping-windmill; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, making partof this specification, in which- Figure 1 represents a front elevationof my invention; Fig. 2, an enlarged front view of the feed-milldetached from the windmill, and Fig. 3 a sectional side view of thesame,

Like letters of reference made use of in each of the figures indicatelike parts.

To enable those skilled in the art to understand and construct myinvention, I will proceed to describe it.

A is the tower upon which the. windmill is mounted. B is thereciprocating rod, which is operated by the crank c in the windmillshaftcl. 6 is a link connecting the reciprocating rod B with the vibratingarm f, which is hung loosely upon the hub of the disk h. g is a pawlattached to the arm f, and takes hold in the ratchet i, which isfastened rigidly to the disk h, so that at every movement of the rod Bthe disk h is moved forward.

The arm f is provided with a slot, 7', by which the link 0 may be movednearer to or farther from the center of motion, to increase or diminishthe speed of the feed-mill, accordin g to the power of the windmill towhich it is attached. j is the shaft upon which the disk h is rigidlyfastened. Z is the live or moving grinding-ring, which is rigidlyattached to the disk h. n is the dead or stationary ring attached to theplank m. These grinding-rings are of hard metal, and similar to thoseused on other feed-mills.

Q is an aperture, through which the grain passes, and falls between thegrinding-rings, and, being ground, passes out at the opening S. O is thehopper, the base of which forms a bearing for one end of the shaft j. Pis the shell or case which incloses the mill, and forms a bearing forthe other end of the shaft j.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

In a grinding-mill having a fixed plate or bed-stone, the runner havingratchet-teeth, as described, in combination with the reciprocatingpitman, having a pawl, as described, substantially as and for thepurpose set forth.

SILAS C. SOHOFIELD.

Vitnesses E. H. MORGAN, OHAs. MORGAN.

